intake or waste gate problem? - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 12-24-2009, 04:21 PM Thread Starter
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intake or waste gate problem?

i got an 02 f-250, 7.3L powerstroke. when the motor is cold and hold rpms goin down the road or in the driveway in park a loud hissing noise coming from engine, if u get on it no power for a while then tons of boost and it takes off, when the truck is at normal operating temp runs like a top no problems. got a couple oppinons that rubber boot clamps on intake may be loose but tightned them and nuthing, hear mabye a waste gate messin up ur sum temp sensor? i dont know a whole lot about the diesel yet but just bought this beast and im learning.
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post #2 of 15 Old 12-24-2009, 04:25 PM Thread Starter
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02 f-250 powerstroke 7.3L when cold loud hold rpms moving ur not loud hiss no power. when trucks warm no problems
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post #3 of 15 Old 12-24-2009, 04:29 PM
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im no 7.3's expert but im pretty sure its the epbv closing they close to help it warm up faster

2008 F250 6.4 CC SB Fx4
Gearhead tunes, flopro exhaust,AFe intake
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post #4 of 15 Old 12-24-2009, 04:32 PM Thread Starter
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where is that located?
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post #5 of 15 Old 12-24-2009, 04:33 PM
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ya let her sit for atleast ten minutes if its below 40 degrees. 7.3l love to let to be warmed up. check for your seals going out also. try plugging her in in the morning before you crank for ten minutes also, there is a plug under the bumper on the driver side of the bumber, just a normal extension cord will work. heats up the engine block, might help whatever is sticking to stop.


4" lift 35's with XD Spy's
AFE Intake
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post #6 of 15 Old 12-24-2009, 04:33 PM Thread Starter
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so is that normal? it just doesnt seem right to me
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post #7 of 15 Old 12-24-2009, 04:36 PM
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no its not normal but until you can take to a mechanic who can run soem test on your waste gate and blowby.. id plug her in, maybe even overnight, and also once you crank let her sit. how cold is it when this is happening


4" lift 35's with XD Spy's
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Full EGR Delete
Air Dog II system
ARP Head Studs
Pypes 7inch Mitre Stack
Bad Asz Ladies, Don't Drive Mercedes.

I love my country, I love my guns, I love my family, I love the way it is now, and anybody that tries to change it has to come through me, that should be all of our attitudes, cause this is America, and a country girls good enough for me, son.
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post #8 of 15 Old 12-24-2009, 04:39 PM
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the ebpv valve closing for warm up is normal

2008 F250 6.4 CC SB Fx4
Gearhead tunes, flopro exhaust,AFe intake
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post #9 of 15 Old 12-24-2009, 04:41 PM
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.. im talking about the fact that its not normal to do that after warm up of atleast 2 minutes


4" lift 35's with XD Spy's
AFE Intake
Full EGR Delete
Air Dog II system
ARP Head Studs
Pypes 7inch Mitre Stack
Bad Asz Ladies, Don't Drive Mercedes.

I love my country, I love my guns, I love my family, I love the way it is now, and anybody that tries to change it has to come through me, that should be all of our attitudes, cause this is America, and a country girls good enough for me, son.
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post #10 of 15 Old 12-24-2009, 04:41 PM Thread Starter
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it sets in the heated building thats around 50 degrees, it does it until its all the way towards the middle of the operating rang, i do leave it set and run for about 5 or 10 mins
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